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Audio Choice by Sound Tech QM4 4 Channel Powered …
https://reverb.com/item/32974218-audio-choice-by-sound-tech-qm4-4-channel-powered-100w-pa-head
The AudioChoice QM4 4 Channel PS Head was designed for the gigging musicians that demand quality and durability they can trust when on the road, a …
AudioChoice QM4 100 Watt 4 channel Power Mixer | Dr …
https://reverb.com/item/14439945-audiochoice-qm4-100-watt-4-channel-power-mixer
The AudioChoice QM4 4 Channel PS Head was designed for the gigging musicians that demand quality and durability they can trust when on the road, a …
DIY Audio Projects Forum • amp blows fuses on power on
http://diyaudioprojects.com/Forum/viewtopic.php?t=3095
Hi all, I'm trying to revive/maintain an old AudioChoice QM4 for a local kid's band. I've attached a schematic, that's from a later version, with minor changes. Therein lies my problem. I've replaced the final outs with a TIP35/36C pair, but it keeps blowing fuses. The 35/36 are both ridiculously hot, just from turning it on.
Audio Choice Soundtech Qm4-4-ch-amp - amlifiprea
https://amlifiprea.com/qm4-4-ch-amp
Brand: Audio Choice By Soundtech . Model: Qm4 4-ch Amp . Type: Qm4 4-ch Amp . . Receivers. Amplifiers Preamps For Sale. sku: 4968796715718323. AUDIO CHOICE SOUNDTECH QM4 4-CH AMP. Audio Choice Soundtech QM4-4-CH-AMP By. Model : QM4 4-CH AMP, Type: QM4 4-CH AMP, Brand: AUDIO CHOICE BY SOUNDTECH ...
Amplifiers - Sound Tech
https://thea.com/Amplifiers-Sound-Tech/
soundtech audio choice qm4 100 watt pa amplifier for sale. channel& overall eq, reverb, and gain controls. line out, effects send& return with foot-switch control inputs, and 4 x mic or line inputs. the amp is in good condition and all inputs& connections are functional. this item does not come with manual, cables or original box.
Designing Audio Power Amplifiers
http://milas.spb.ru/~kmg/files/literature/Designing%20Audio%20Power%20Amplifiers.pdf
MOSFETs. Bob is also a prolific designer of audio test equipment, including a high-performance THD analyzer and many purpose-built pieces of audio gear. He has published numerous articles and papers on power amplifier design and distortion measurement in the popular press and in the Journal of the Audio Engineering Society. In 1983 he published ...
Audio Circuits: Power Amplifiers
http://www.discovercircuits.com/A/au-pwramps.htm
This amplifier circuit will deliver 25W on each output channel. 2×30W Audio Amplifier with STK465 - Simple circuit with higher power output, this amplifier circuit is very easy to build. Just look at the PCB layout of this circuit. he active component required is just the main power amplifier chip STK465.
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