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Powercom: Authorized Dealer Of Toshiba Ups / Power Conditioners
Powercom, an Authorized Distributor of ONEAC and TOSHIBA power conditioning and
Un-interruptible Power Supplies (UPS) was founded in 1989 as an engineering centric
company specializing in Computer Grade Power, Modems, Multiplexers and CSU/DSU's. In October of 2008, it was purchased by Morris Danhi.
The company has recently been awarded the contract to supply Toshiba UPS systems to Verde Engineering for the installation of several 22kVA Toshiba 1600EP UPS’, an
80kVA Toshiba 4200FA UPS, and a 160kVA Toshiba G9000 UPS. These highly
reliable, high performance systems are being installed at Time Warner Cable Company facilities for Power Conditioning and Battery Back-Up purposes.
In terms of uninterruptible power systems (UPS), Powercom, the authorized dealer for TOSHIBA UPS offers a wide variety of affordable, efficient and effective solutions.
Designed for stand-alone or parallel use in up to four-unit configurations without requiring the use of a special switchgear cabinet, the G9000 series UPS is available in capacities of 80, 100, 160 and 225 kVA and comes with an industry-leading three-year onsite warranty.
Also available is the Digital Signal Processor (DSP) Control, Fully Digital IGBT Converter & Inverter. It has a High Efficiency (96%) Over Wide Load Range, Transformer-Less Design, N+1 and N+N (Up to Four in Parallel) Capability, Dual-Input Feed, Electronic Battery Isolation, RS232 and Dry Contact Interface, Small Footprint, and Lightweight Design.
Toshiba’s Single Phase 1000 Series
The 1000 Series of Toshiba’s single phase UPS devices offers clean single-phase power to any critical system. It features auto-restart, cold start, a programmable load shed receptacle, an intelligent charger, wide input voltage window and multiple-language LCD display… standard. Available in Rack or Tower mounting. Sizes include: 1.0, 1.5, 2.0 and 3.0 kVA.
As a double-conversion on-lineUPS, it’s especially practical for industrial systems, health care environments, laboratories, small business offices, point-of-sale retailers, internet service providers, data center and wiring closets.
Toshiba’s Single Phase 1600 EPSeries
With a double conversion online UPS system, the Single Phase 1600 EPSeries from
Toshiba has a great tower design look. It features hot swappable batteries, hot swappable cooling fans, internal isolation transformer, digital LCD display, a wide input voltage window, power factor correction and an excellent output power factor of 0.85.
Toshiba’s Single Phase 1800 Series
Available in 2.4kVA, the Toshiba 1800 Series can supply uninterrupted, clean single-
phase power to critical systems even if the utility power fails. It offers true on-line
double conversion, PWM input PF correction UPS, an isolation transformer, high
overload and CF for motor type loads, auto-restart, cold start features, increased input voltage window (for increased battery life), four fan speed, and wide input frequency.
Toshiba’s Three Phase 4200 FA CT Series
Designed as a state-of-the-art UPS system with a surprisingly small footprint, the Toshiba 4200 FA series meets customers’ needs to a “t”. It has the largest input voltage and frequency window in the industry, allowing the unit to be user-friendly. The front-end IGBT design of the Toshiba power conditioning unit allows it to work optimally at 0-100% load. Best of all, the Toshiba 4200 FA comes with a standard three-year warranty. Designed for internal batteries and internal maintenance bypass,
there is no need for additional cabinets.
In addition, the 4200 FA CT characteristics include true on-line double conversion, an
input power factor of greater than 0.98, an input current of less than 3%, electronic power factor correction, 100% unbalanced load capability and SNMP/web-based monitoring.
Featuring a high-performance insulated gate bipolar transistor (IGBT), the Toshiba
G8000 Series has taken on the world’s top share. As the first in the industry to employ IGBT high-speed power elements in UPS, Toshiba continues to apply advanced technologies.
The G8000 Series includes advanced features which are standard on all G8000 UPS
Systems: 0.98 input power factor, low input current THD, generator-friendly design,
space-saving footprint, front access design, 24/7 monitoring/service, SNMP/HTTP
remote monitoring, user-friendly interfaces and redundant inputs.
window for complete generator compatibility.
In Addition, The 4200 FA XT Series from Toshiba, like the 4200 CT Series (above), has a three-year warranty, standard. Designed for External Battery Options for Custom Battery Back-up time, and External Isolation Transformer(s).
Toshiba's Three Phase 4200 FX XT Series
Features include electronic power factor correction, complete front access for installation and service, batter-friendly charger design, internal isolation transformer option and multiple three-phase voltage combinations.
Toshiba's Three Phase G 8000 Series
Featuring a high-performance insulated gate bipolar transistor (IGBT), the Toshiba
G8000 Series has taken on the world’s top share. As the first in the industry to employ IGBT high-speed power elements in UPS, Toshiba continues to apply advanced technologies.
The G8000 Series includes advanced features which are standard on all G8000 UPS
Systems: 0.98 input power factor, low input current THD, generator-friendly design,
space-saving footprint, front access design, 24/7 monitoring/service, SNMP/HTTP
remote monitoring, user-friendly interfaces and redundant inputs.
Toshiba's G9000 Series-
The G9000 series UPS is available in capacities of 80, 100, 160, and 225 KVA and comes with an industry-leading three-year onsite warranty. It is designed for stand-alone or parallel use in up to four-unit configurations without requiring the use of a special switchgear cabinet.It incorporates the next-generation IGBT technology and has a wide input voltage range.
About the Author
Powercom is an authorized dealer for ONEAC and TOSHIBA and a leading provider of Uninterruptable Power Systems and Solutions that help small, medium and large size companies keep their operations running 24 hours, 7 days a week.For more information on the Toshiba Line of power conditioning and Un-interruptible Power Supplies, please visit - powercom.com
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Thd Univalve Head And 2X12 Half Stack Black $1678 The quality THD Univalve half stack brings style and stength to your guitar with a THD UniValve 15W Class A amplifier head and a 2x12 THD ported extension cabinet. THD 15W UniValve Class A Amplifier Head The THD UniValve 15W Class A Amplifier Head delivers tones from smooth and clear to warm and full to aggressive overdrive. The single-ended Class A circuit design uses the highest-quality parts and hand-built construction for clean and faultless operation. The single output tube can be switched at will with nearly any octal-based power tube for different tones without re-biasing the amp, and the 2 preamp tubes can be switched for any combination of 12AX7, 12AT7, 12AU7, 12AY7, or 12AZ7 tubes. The THD UniValve amp head is easily capable of driving a 4x12" cabinet, yet is also small and light. Its built-in Hot Plate Power Attenuator lets you experience the indescribable freedom of wailing away with full output distortion at volume levels that are quiet enough to let your neighbors sleep. There are 2 inputs - one for high gain and one for low gain. With 12AX7 preamp tubes, the low gain input gives a wide range of sounds from Nashville clean and crisp to Memphis down and dirty. With the controls pegged and a relatively high-output humbucker, the low-gain input delivers a tantalizing Texas blues overdrive. Plug into the high-gain input for a whole new world--from early British Invasion tones to modern high-gain metal attack--but with none of the mush and confusion normally associated with high-gain tones. The controls include the traditional Volume, Treble, and Bass along with an Attitude control knob that determines how the driver stage responds to signal and how it drives the power tube. There are also controls for the Hot Plate, including a hard-bypass switch. The noise reduction circuit in the Hot Plate features a light bulb fixture on the front panel that glows when you play. There is an On-Off switch for the light bulb. On the back panel the UniValve has a transformer-isolated line out with an adjustable level control and a switch to choose line-level or instrument-level signal. The speaker outs on the UniValve can drive any speaker load from 2 ohms all the way up to 16 ohms. When there is no speaker plugged into the speaker jack, the amp uses its own built-in dummy load so no damage will occur, and it's awesome for direct recording. 2x12 Ported Extension Cabinet The THD 2-12 Extension Cabinet is the key to the magic between your fingers and your ears. Delivering a sound that is deep, smooth, clear, focused, and sweet, this cabinet truly is a vital element for improving the tone chain. The Ported Extension Cab is a bass-reflex design cabinet with a slot-port in the rear instead of the more common tube port in the front. Unlike a tube-port, there is no chance of "whistling" through the slot-port in THD's cabinets. The slot-port being shallow, but wide, gives a lot of rear projection and a more open, 3-D sound similar to an open back cab, |
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Thd Univalve Head And 2X12 Half Stack Brown $1678 The quality THD Univalve half stack brings style and stength to your guitar with a THD UniValve 15W Class A amplifier head and a 2x12 THD ported extension cabinet. THD 15W UniValve Class A Amplifier Head The THD UniValve 15W Class A Amplifier Head delivers tones from smooth and clear to warm and full to aggressive overdrive. The single-ended Class A circuit design uses the highest-quality parts and hand-built construction for clean and faultless operation. The single output tube can be switched at will with nearly any octal-based power tube for different tones without re-biasing the amp, and the 2 preamp tubes can be switched for any combination of 12AX7, 12AT7, 12AU7, 12AY7, or 12AZ7 tubes. The THD UniValve amp head is easily capable of driving a 4x12" cabinet, yet is also small and light. Its built-in Hot Plate Power Attenuator lets you experience the indescribable freedom of wailing away with full output distortion at volume levels that are quiet enough to let your neighbors sleep. There are 2 inputs - one for high gain and one for low gain. With 12AX7 preamp tubes, the low gain input gives a wide range of sounds from Nashville clean and crisp to Memphis down and dirty. With the controls pegged and a relatively high-output humbucker, the low-gain input delivers a tantalizing Texas blues overdrive. Plug into the high-gain input for a whole new world--from early British Invasion tones to modern high-gain metal attack--but with none of the mush and confusion normally associated with high-gain tones. The controls include the traditional Volume, Treble, and Bass along with an Attitude control knob that determines how the driver stage responds to signal and how it drives the power tube. There are also controls for the Hot Plate, including a hard-bypass switch. The noise reduction circuit in the Hot Plate features a light bulb fixture on the front panel that glows when you play. There is an On-Off switch for the light bulb. On the back panel the UniValve has a transformer-isolated line out with an adjustable level control and a switch to choose line-level or instrument-level signal. The speaker outs on the UniValve can drive any speaker load from 2 ohms all the way up to 16 ohms. When there is no speaker plugged into the speaker jack, the amp uses its own built-in dummy load so no damage will occur, and it's awesome for direct recording. 2x12 Ported Extension Cabinet The THD 2-12 Extension Cabinet is the key to the magic between your fingers and your ears. Delivering a sound that is deep, smooth, clear, focused, and sweet, this cabinet truly is a vital element for improving the tone chain. The Ported Extension Cab is a bass-reflex design cabinet with a slot-port in the rear instead of the more common tube port in the front. Unlike a tube-port, there is no chance of "whistling" through the slot-port in THD's cabinets. The slot-port being shallow, but wide, gives a lot of rear projection and a more open, 3-D sound similar to an open back cab, |
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Thd Univalve Head And 2X12 Half Stack Paisley $1678 The quality THD Univalve half stack brings style and stength to your guitar with a THD UniValve 15W Class A amplifier head and a 2x12 THD ported extension cabinet. THD 15W UniValve Class A Amplifier Head The THD UniValve 15W Class A Amplifier Head delivers tones from smooth and clear to warm and full to aggressive overdrive. The single-ended Class A circuit design uses the highest-quality parts and hand-built construction for clean and faultless operation. The single output tube can be switched at will with nearly any octal-based power tube for different tones without re-biasing the amp, and the 2 preamp tubes can be switched for any combination of 12AX7, 12AT7, 12AU7, 12AY7, or 12AZ7 tubes. The THD UniValve amp head is easily capable of driving a 4x12" cabinet, yet is also small and light. Its built-in Hot Plate Power Attenuator lets you experience the indescribable freedom of wailing away with full output distortion at volume levels that are quiet enough to let your neighbors sleep. There are 2 inputs - one for high gain and one for low gain. With 12AX7 preamp tubes, the low gain input gives a wide range of sounds from Nashville clean and crisp to Memphis down and dirty. With the controls pegged and a relatively high-output humbucker, the low-gain input delivers a tantalizing Texas blues overdrive. Plug into the high-gain input for a whole new world--from early British Invasion tones to modern high-gain metal attack--but with none of the mush and confusion normally associated with high-gain tones. The controls include the traditional Volume, Treble, and Bass along with an Attitude control knob that determines how the driver stage responds to signal and how it drives the power tube. There are also controls for the Hot Plate, including a hard-bypass switch. The noise reduction circuit in the Hot Plate features a light bulb fixture on the front panel that glows when you play. There is an On-Off switch for the light bulb. On the back panel the UniValve has a transformer-isolated line out with an adjustable level control and a switch to choose line-level or instrument-level signal. The speaker outs on the UniValve can drive any speaker load from 2 ohms all the way up to 16 ohms. When there is no speaker plugged into the speaker jack, the amp uses its own built-in dummy load so no damage will occur, and it's awesome for direct recording. 2x12 Ported Extension Cabinet The THD 2-12 Extension Cabinet is the key to the magic between your fingers and your ears. Delivering a sound that is deep, smooth, clear, focused, and sweet, this cabinet truly is a vital element for improving the tone chain. The Ported Extension Cab is a bass-reflex design cabinet with a slot-port in the rear instead of the more common tube port in the front. Unlike a tube-port, there is no chance of "whistling" through the slot-port in THD's cabinets. The slot-port being shallow, but wide, gives a lot of rear projection and a more open, 3-D sound similar to an open back cab, |
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Thd Univalve Head And 2X12 Half Stack Creme $1678 The quality THD Univalve half stack brings style and stength to your guitar with a THD UniValve 15W Class A amplifier head and a 2x12 THD ported extension cabinet. THD 15W UniValve Class A Amplifier Head The THD UniValve 15W Class A Amplifier Head delivers tones from smooth and clear to warm and full to aggressive overdrive. The single-ended Class A circuit design uses the highest-quality parts and hand-built construction for clean and faultless operation. The single output tube can be switched at will with nearly any octal-based power tube for different tones without re-biasing the amp, and the 2 preamp tubes can be switched for any combination of 12AX7, 12AT7, 12AU7, 12AY7, or 12AZ7 tubes. The THD UniValve amp head is easily capable of driving a 4x12" cabinet, yet is also small and light. Its built-in Hot Plate Power Attenuator lets you experience the indescribable freedom of wailing away with full output distortion at volume levels that are quiet enough to let your neighbors sleep. There are 2 inputs - one for high gain and one for low gain. With 12AX7 preamp tubes, the low gain input gives a wide range of sounds from Nashville clean and crisp to Memphis down and dirty. With the controls pegged and a relatively high-output humbucker, the low-gain input delivers a tantalizing Texas blues overdrive. Plug into the high-gain input for a whole new world--from early British Invasion tones to modern high-gain metal attack--but with none of the mush and confusion normally associated with high-gain tones. The controls include the traditional Volume, Treble, and Bass along with an Attitude control knob that determines how the driver stage responds to signal and how it drives the power tube. There are also controls for the Hot Plate, including a hard-bypass switch. The noise reduction circuit in the Hot Plate features a light bulb fixture on the front panel that glows when you play. There is an On-Off switch for the light bulb. On the back panel the UniValve has a transformer-isolated line out with an adjustable level control and a switch to choose line-level or instrument-level signal. The speaker outs on the UniValve can drive any speaker load from 2 ohms all the way up to 16 ohms. When there is no speaker plugged into the speaker jack, the amp uses its own built-in dummy load so no damage will occur, and it's awesome for direct recording. 2x12 Ported Extension Cabinet The THD 2-12 Extension Cabinet is the key to the magic between your fingers and your ears. Delivering a sound that is deep, smooth, clear, focused, and sweet, this cabinet truly is a vital element for improving the tone chain. The Ported Extension Cab is a bass-reflex design cabinet with a slot-port in the rear instead of the more common tube port in the front. Unlike a tube-port, there is no chance of "whistling" through the slot-port in THD's cabinets. The slot-port being shallow, but wide, gives a lot of rear projection and a more open, 3-D sound similar to an open back cab, |
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Thd Bivalve-30 Box Head 30W Tube Guitar Amp Black $1825 THD put a BiValve-30 in the Head Box to give the BiValve-30 Box Head a more traditional guitar amp head look. The vinyl-covered Baltic birch ply cabinet gives the THD BiValve-30 Box Head a classic look and provides superior protection for the knobs and switches, both front and back. This Box Head version is designed to fit perfectly on top of THD's popular 2x12" speaker cabinet, but will be equally at home on any of the popular 2x12" or 4x12" cabinets on the market.THD BiValve-30 30W Class A Amplifier HeadThe THD BiValve-30 30W Class A Amplifier Head is a pure Class A design with 2 output tubes wired in parallel and combined through a special output transformer to deliver up to 30W. It accepts almost any type of output or preamp tube without bias adjustment-even in combination-for an astonishingly wide range of tone available for nearly any style of guitar playing. The standard of construction is absolutely top-class, as you would expect for any handmade amplifier.Inside, you'll find large transformers and hi-fi style internal baffle plates to cut down on hum, as well as the tube sockets. On its front panel is a pair of input jacks labeled More and Less, followed by a Cut switch (high-cut filter), Volume, Treble, Bass, and Attitude (driver tube response control). In the center is a light bulb that glows as the amp distorts with a small switch to turn it off, a control for the built-in Hot Plate (output attenuator), and a defeat switch for the Hot Plate.Check the drop-down menu to the right to select colors and/or other options.Head boxVinyl-covered Baltic birch ply cabinetDesigned to fit perfectly on top of THD's popular 2x12" speaker cabinetTHD BiValve-30 30W Class A Amplifier Head30W Class A amplifierSingle channelHand builtAccepts almost any preamp and power tubes in any combinationShips with 3 - 12AX7s (preamp) and 2 EL34s (power amp)More and Less inputsVolume, Treble, Bass, and Attitude knobsBuilt-in Hot Plate output attenuator |
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THD BiValve-30 30W 1x12 Tube Guitar Combo Amp Black $1822.65 This THD amp is a 30W, 1x12 combo version of the THD BiValve-30 Class A Amplifier Head which has 2 output tubes wired in parallel and combined through a special output transformer to deliver up to 30W. It accepts almost any type of output or preamp tube without bias adjustmenteven in combinationfor an astonishingly wide range of tone available for nearly any style of guitar playing. The amplifier's construction is absolutely top class, as you would expect for any handmade amplifier.Underneath its large, perforated steel lid you'll find large transformers and hi-fi style internal baffle plates to cut down on hum, as well as the tube sockets. On its front panel is a pair of input jacks labeled More and Less, followed by a Cut switch (high-cut filter), Volume, Treble, Bass, and Attitude (driver tube response control). In the center is a light bulb that glows as the amp distorts with a small switch to turn it off, a control for the THD BiValve-30's built-in Hot Plate (output attenuator), and a defeat switch for the Hot Plate.The THD BiValve-30 amp sports an acid-etched control plate with a delicate marine theme inspired by Glasgow artist Charles Rennie Mackintosh.30W Class A amplifier1 x 12" speakerSingle channelHand-builtAccepts almost any preamp and power tubes in any combinationShips with 3 x 12AX7s (preamp) and 2 x EL34s (power amp)More and Less inputsVolume, Treble, Bass, and Attitude knobsBuilt-in Hot Plate output attenuator |
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THD BiValve-30 Box Head 30W Tube Guitar Amp Black $1825 This is the Head Box with a BiValve-30 installed in it. It is the same BiValve-30 THD has always made, but now available in a more traditional head look. The vinyl-covered Baltic birch ply cabinet gives a classic look to the award winning BiValve-30 and provides superior protection for the knobs and switches, both front and back. This head version is designed to fit perfectly on top of THD's popular 2x12" speaker cabinet, but will be equally at home on any of the popular 2x12" or 4x12" cabinets on the market.BiValve-30 30W Class A Amplifier HeadThe THD BiValve-30 30W Class A Amplifier Head is a pure Class A design with 2 output tubes wired in parallel and combined through a special output transformer to deliver up to 30W. It accepts almost any type of output or preamp tube without bias adjustment-even in combination-for an astonishingly wide range of tone available for nearly any style of guitar playing. The standard of construction is absolutely top-class, as you would expect for any handmade amplifier.Inside, you'll find large transformers and hi-fi style internal baffle plates to cut down on hum, as well as the tube sockets. On its front panel is a pair of input jacks labeled More and Less, followed by a Cut switch (high-cut filter), Volume, Treble, Bass, and Attitude (driver tube response control). In the center is a light bulb that glows as the amp distorts with a small switch to turn it off, a control for the built-in Hot Plate (output attenuator), and a defeat switch for the Hot Plate.Head boxVinyl-covered Baltic birch ply cabinetDesigned to fit perfectly on top of THD's popular 2x12" speaker cabinetTHD BiValve-30 30W Class A Amplifier Head30W Class A amplifierSingle channelHand builtAccepts almost any preamp and power tubes in any combinationShips with 3 - 12AX7s (preamp) and 2 EL34s (power amp)More and Less inputsVolume, Treble, Bass, and Attitude knobsBuilt-in Hot Plate output attenuator |
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Used Thd Bivalve-30 30W 1X12 Tube Guitar Combo Amp Black $1822.65 This THD amp is a 30W, 1x12 combo version of the THD BiValve-30 Class A Amplifier Head which has 2 output tubes wired in parallel and combined through a special output transformer to deliver up to 30W. It accepts almost any type of output or preamp tube without bias adjustmenteven in combinationfor an astonishingly wide range of tone available for nearly any style of guitar playing. The amplifier's construction is absolutely top class, as you would expect for any handmade amplifier.Underneath its large, perforated steel lid you'll find large transformers and hi-fi style internal baffle plates to cut down on hum, as well as the tube sockets. On its front panel is a pair of input jacks labeled More and Less, followed by a Cut switch (high-cut filter), Volume, Treble, Bass, and Attitude (driver tube response control). In the center is a light bulb that glows as the amp distorts with a small switch to turn it off, a control for the THD BiValve-30's built-in Hot Plate (output attenuator), and a defeat switch for the Hot Plate.The THD BiValve-30 amp sports an acid-etched control plate with a delicate marine theme inspired by Glasgow artist Charles Rennie Mackintosh.30W Class A amplifier1 x 12" speakerSingle channelHand-builtAccepts almost any preamp and power tubes in any combinationShips with 3 x 12AX7s (preamp) and 2 x EL34s (power amp)More and Less inputsVolume, Treble, Bass, and Attitude knobsBuilt-in Hot Plate output attenuator |
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THD BiValve Rack-mounted Guitar Amp Head Red $1629 The BiValve is a single-ended pure Class A design. However, it has two output valves which are wired in parallel and combined through a special output transformer to deliver up to around 30 watts. You can use almost any output valve you like without touching any kind of bias adjustment, and get this: in the BiValve you can use them in any combination as well.2 output valves of nearly any type in any combination allows incredibly diverse tone possibilities No bias adjustment necessary Rackmountable Top class construction 2 input jacks Controls: volume, treble, bass, attitude Switchable noise reduction light bulb Built-in THD Hot Plate |
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Thd Bivalve Rack-Mounted Guitar Amp Head Red $1629 Like the UniValve, the THD BiValve Rack-mounted Guitar Amp Head is a single-ended pure Class A design. However, it has two output valves that are wired in parallel and combined through a special output transformer to deliver up to around 30 watts. You can use almost any output valve you like without touching any kind of bias adjustment, and get this: in the BiValve you can use them in any combination as well. Combined with the capability to take almost any preamp valve, this makes the BiValve even more of an amp-tweaker's dream than its predecessor. Because there's such a wide range of tone available, you create your own style. The BiValve Rack mount amplifier head sits in the same compact pressed steel chassis as the UniValve and, except for the extra valve and control plate, it looks almost identical. Glasgow artist Charles Rennie Mackintosh inspired the UniValve's acid-etched control plate; this time round THD have gone for a marine theme, with an intricate diamond scale design. The control markings are screen printed, which makes them easier to see. Underneath the perforated steel lid there's a larger pair of transformers to handle the increased output, and inside there are two ultra-thick PCBs: one for the power supply and one for the audio. The four valve bases are bolted to the chassis and secured by locking nuts, with hi-fi style internal baffle plates to cut down on radiated hum. The standard of construction is absolutely top class. THD are based in Seattle, which is also hometown to Boeing, and most of the BiValve's heavy fabrication work is contracted out to local specialist companies who service the aircraft industry. The front panel looks deceptively simple. Working from the left, there's a pair of input jacks labeled "more" and "less", followed by a treble cut switch then rotary controls for volume, treble, bass and what THD call "Attitude". It's not a fancy name for a presence control - there's no negative feedback loop - instead Attitude works on the driver valve to change its response, and does more or less what the name suggests: either smoothing things out or making them more aggressive. In the center, part of a clever noise reduction circuit, is a light bulb that glows as the amp distorts. Depending on your point of view it either looks very hip or very distracting, hence a small switch underneath to turn it off. Next to this is the level control for the Hot Plate - a built-in output attenuator that lets you run the THD BiValve into total meltdown without annoying the neighbors; there's also a defeat switch for this function, which adds a little extra volume for live work. The last three rocker switches are for mains, standby and power selection. The hi/lo power switch is like having a built-in Variac; switching to low voltage adds a squashy dynamic feel and reduces clean headroom, and it's essential for valves like the 6V6, which can't handle high plate voltages. The BiValve's back panel is also similar to its smaller c |
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