the t.amp S-150 MK II

193

Power amplifier

  • 2 x 150 W at 4 ohms
  • 2 x 85 W at 8 ohms
  • Balanced inputs with XLR and jack
  • Bridgeable
  • Speaker Twist and binding post outputs for LS Out
  • All protection circuits including Softstart
  • Switchable input sensitivity of 0.775 Vrms to 1.4 Vrms, or can be switched to 26 dB Gain
  • Damping factor > 150
  • Convection cooled (no fan)
  • 19", 2U, depth 32 cm (without handles)
  • Weight 11.5 kg
available since January 2000
Item number 141141
sales unit 1 piece(s)
Power (4 Ohms) per Channel 150 W
Channels 2
Rack Units 2 U
Amp Class Class AB
2 Ohm stable No
DSP/Crossover No
Convection cooling Yes
Width in mm 483 mm
Depth in mm 320 mm
Height in mm 88 mm
Weight 11,5 kg
Bridged Mode 1
Input XLR 1
Jack Input 6,3 sym. 1
Parallel Input 1
Link Out No
Output Speaker Twist 1
Output Binding Post 1
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$163
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Precise and linear

The S-150 MK II is a high-quality two-channel power amplifier that sets the standard for systems in this price range. Developed by Thomann’s in-house brand, the t.amp, the S-150 MK II’s linear frequency response, low self-noise and distortion, and generous power output will doubtless have sound enthusiasts sitting up and taking notice. Since the amplifier is convection-cooled (meaning no noisy fan is installed), it runs silently too. The S-150 MK II provides plenty of flexibility and connectivity for input/output configurations, including a handy “input sensitivity” switch, which, among other things, allows several amps to be combined to the same output level.

Versatile and functional

The S-150 MK II is class AB amplifier with built-in limiters. Its maximum output is 250 W (in “bridge mode”, at 8 ohms) with a damping factor of over 150dB. As previously mentioned, it features a quiet convection-cooling system. The rear connection panel offers a choice of balanced 6.35mm jack or XLR inputs, and “Speaker Twist” or binding outputs. The “input sensitivity” selector allows users to switch between 0.77V/RMS and 1.4V/RMS, while the 26dB setting matches the output levels of each amp when they are combined. The S-150 MK II is a 2RU rack-mountable unit (measuring 483×320×88mm) and weighs a reassuring 11.5kg. It features three operating modes – “Stereo” and “Parallel”, which operate at 2x85W at 8 ohms and 2x150W at 4 ohms, and “Bridge” mode, which allows the user to double the input channels to a single output and provides 250W of power at an impedance of 8 ohms.

For monitoring and listening

The S-150 MK II’s linear and “unadulterated” sound makes it a good candidate for passive monitoring systems in the studio (the silent heat sink will be appreciated here, and the variety of inputs and outputs are all of professional quality). Hi-fi enthusiasts looking to “level up” should also be looking at this amplifier (with adapted speakers of course). If the amp has to be placed in an inconvenient or out-of-reach location, whether for practical or esthetical reasons, a handy ERP switch automatically puts the amplifier in standby mode after 20 minutes of inactivity.

About the t.amp

the t.amp is one of the many in-house brands belonging to Musikhaus Thomann, and since 1998 has offered power amplifiers, complete passive PA sets, keyboard amplifiers, and connection systems. The brand’s entire product range delivers an impressive combination of quality and reliability at attractive prices, and users can find a convincing and affordable solution for every application: From youth clubs and sports halls through to congress centres and much more.

Installation and connection made easy

The S-150 MK II can simply be stood on its rubber feet, or, alternatively, it can be mounted in a 19" rack, which of course provides the best protection. In this case, it is advisable to leave a 1RU space free above the amp in order to ensure good airflow. All the inputs and outputs are at the back of the amplifier. As mentioned previously, the S-150 MK II has three operating modes. In Stereo mode, both channels remain independent, and the outputs can be individually controlled; in Parallel mode, the two input channels receive the same signal on channel 1 and both outputs are controlled by channel 1; finally, in Bridge mode, the two input channels are connected so that the output is doubled. Only the input on channel 1 is amplified and the output volume is also controlled on channel 1.

m
Nice and clear sound for my tweeters and horn
marocv 23.12.2020
This one might be slightly too powerful for my tweeter and horn passive speakers. I am sending one channel to tweeter and one channel to horn, and have to be careful not sending too much power there. Sounds really clear even at high volume, voices and plates fill up the room nicely and can come above my bass section nicely.

It was really hard to put it into my rack - it's really heavy: get a friend to hold it from the back while you put in the screws
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m
Pergola use
manavees 09.01.2021
paired it with 4 x mask4c speakers into 4 ohm and i think it is a great combnation for my needs. As always thomann support and suggestions are the best!
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A
The power is turned off.
Anonymous 02.09.2016
Power does not listen to sound even at low volume off.
It failed in less than half a year.
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google translate de
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N
Rezensionen S-150
Nachrichtenindustrie 04.03.2022
Die Bauausführung ist in Relation zum Preis als überragend zu bezeichnen. Der von manchen wahrgenommene Netzbrumm des Ringkerntransformators ist völlig normal zur angewandten Technik.

Der Ringkerntransformator bleibt auch nach 2 Stunden ohne Last kalt und ist somit richtig dimensioniert. Die S/N Messung ist hervorragend gut und frei von Netzartefakten. Der Frequenzgang ist bei beiden Kanälen linear und indentisch. Als obere Übertragungsfrequenz bei voller Leistung wurde 70 kHz ermittelt. Auch beim Sub-Bass ist kein Pegelabfall feststellbar. Bei der Kanaltrennung ist dieser Verstärker kein Superlativ, jedoch eine Kanaltrennung von Faktor größer 100 ist bei einer gleichzeitigen Beaufschlagung beider Kanäle nicht wahrnehmbar. Die hohe Übertragungsbandbreite von 70 kHz lässt Rückschlüsse auf eine gelungene nicht zu stark wirkende Gegenkopplung zu. Damit gesegnet ist der Verstärker voll Hi-Fi tauglich.

Die erreichte Ausgangsleistung ist bei beiden Kanälen indentisch. Bei 8 Ohm Last steht eine Spitzenspannung von 32 Volt zur Verfügung. Bei 4 Ohm Last steht eine Spitzenspannung von 30 Volt zur Verfügung. Die eingerasteten Pegelsteller sind nicht absolut indentisch. Der eingebaute Pegel Limiter funktioniert exakt, dabei ist zu beachten dass bei aufleuchten der roten LED dies mit einer Dynamik Reduzierung einhergeht.

Manche Nutzer bezeichnen diesen Verstärker als Bass schwammig, dies ist jedoch ein Irrtum weil zur linearen Leistungsübertragung tiefer Frequenzen recht große Lautsprecher Membranen erforderlich sind, diese oft verkannt werden, oder nicht vorhanden sind und der Versuch dies über einen höheren Tiefbasspegel zu kompensieren an der einsetzenden Dynamikkompression scheitert. Die Abhilfe besteht darin die Verstärkerleistung auf ein normals Niveau zu reduzieren oder einen stärkeren Verstärker mit höherer Leistung anzuwenden. Ich war wegen des niedrigen Preis skeptisch, wurde jedoch bei den guten Eigenschaften in der Funktionalität mehr als überrascht.
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