the t.amp S-75 MK II

Power amplifier

  • 2 x 75 W at 4 ohms
  • 2 x 45 W at 8 ohms
  • Balanced inputs with XLR and jack
  • Bridgeable
  • Speaker Twist and terminal connections for speaker out
  • All protection circuits including Softstart
  • Switchable input level of -0 +4 db
  • Damping factor > 150
  • For all applications where no fan is desired
  • 19" Rack mount 1U, depth 33 cm
  • Weight: 7.5 kg

Further Information

Power (4 Ohms) per Channel 75 W
Channels 2
Rack Units 1 U
Amp Class Class AB
2 Ohm stable No
DSP/Crossover No
Convection cooling Yes

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Exceptional service from Thomann
markodarko, 13.05.2014
I bought my original t.amp S-75 Mk II way back in September 2013 and through a series of events my studio wasn't ready so that I could install it until April 2014. Sure enough, April came and I cracked open the box, mounted it into the rack, wired it all up and switched it on. Worked a treat right away.

After my initial, brief testing, I turned it off and carried on wiring other parts of the studio. Around half an hour later I turned the unit back on to test another bit of equipment and the power light turned from green to red after a minute or so. At the same time a relay-like "click" came from the unit.

I thought I must have overloaded it it or something (even though I knew I couldn't possibly have) so I turned it off, put all the levels down to zero and turned it back on again. This time the power light stayed perpetually red. No green light at all.

I went through a process of unplugging everything, waiting 3 minutes, turning everything back on and off again but nada, zilch, nothing. It seemed the unit was dead, so I left it and went for some food.

A few hours later I came back and switched it on again and to my surprise the green light came on again and all worked as before. Hurrah! Except, after a few minutes the same red light of death appeared and that was the end of that. Again.

I contacted Thomann and they immediately sent out a replacement once I'd returned the damaged one - free of charge - and it was all sorted within a week.

I have no idea what went wrong initially but the replacement is a-ok. Had I have bought this from another vendor I probably would have had to fight to get a replacement sent out after 7 months but I have to hand it to Thomann, their after-sales service is simply spot on - which is one of the reasons I keep coming back time and time again to them even if it does take a little longer to arrive to the UK from Germany than a UK-based shop.

As for the new amp, well, it's a great little unit and plenty loud enough for a small studio. I'm running it into JBL Control 1's as they're so unforgiving to mix with and the combination works well. My only slight gripe is that because it has a real transformer - and not a switch-mode power supply (and the reason why the amp is so heavy for its size), it does exhibit a slight 50Hz mains hum. It's not bad, don't get me wrong, but if you're planning on mounting this onto a desk rack and mix quietly, then the hum could transfer into your desk and hence be amplified and become an audible problem. So, if you are going to desk mount it I'd stick some absorbing rubber underneath the desk rack to prevent this.

Oh, and it's built like a tank. I expect this will outlive every other item in the studio.
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Cracking little amps
Mark8610, 15.02.2016
I have an S-75 for studio monitoring and an S-100 in my small portable DJ rig. For studio monitoring purposes it is particularly important to avoid the noise of a fan. Be aware though that it does mean these have to be well ventilated. You'll need to leave space in the rack top and bottom if you want to use these to their full capacity. The thermal protection will operate before you get into the realms of distortion - which is no bad thing, just remember it's there.
The sound is pure and uncoloured, and the power delivery adequate for near field monitoring. The thermal protection issue only raises its head after prolonged listening to bass-heavy material (at levels where you can feel the draught from the woofers on your face!).
Thankfully with this generation you can turn off the standby function, where the unit shuts down when a signal level threshold is not breached for a period of time.
Connectors are all good solid industry standard types, and the general construction is no-frills but functional - like you'd expect from a professional piece of kit.
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T.Amp S-75
SMHR, 12.09.2017
We bought two of these amps for our Hospital Radio studio to replace two hifi amplifiers.

I did wonder when looking online if an amp at that price would sound any good but also be very well built.

This amp does not disappoint at all. It sounds great and the power save function is very useful. Very well built and have had these running now for a few months with no issues.
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A good amp, just don't buy for theatre use!
George D., 21.02.2014
Essentially a well built, quiet-running, good-sounding amp.

However, I bought it to use in a theatre context to power a pair of JBL Control 1s. While it's capable of doing this, it has an in-built power-saving feature, whereby it turns itself off after 5 minutes of little to no signal. It then takes about 5 - 10 seconds to turn back on again once it registers signal. While I understand later generations will have the ability to turn this feature off, at the moment this can't be bypassed. Unfortunately for my purposes this renders it unusable.

So, I'm sure for other applications it's perfectly good, just not for theatre!
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