Theta DigitalEnterprise Mono BlocksusedTheta Digital Enterprise Mono Blocks 300 WPC Amplifiers Silver in Excellent Condition- 1 Pair !300 WPC MONO BLOCKS - WORLD CLASS THETA MONOBLOCKS !I have 2 Silver Enterprise Mono Blocks Available. The price listed is for 1 pair. These have the Upgraded Dual Binding Posts which was ...3875.00

Theta Digital Enterprise Mono Blocks 300 WPC Amplifiers Silver in Excellent Condition- 1 Pair ! [Expired]

no longer for sale


I have 2 Silver Enterprise Mono Blocks Available. 

The price listed is for 1 pair.    
These have the Upgraded Dual Binding Posts which was 500 just for the post upgrade alone.

They are in pristine condition and come from my business partners Smoke free and clean home.

Amazing condition as you see in the pics.

In Original Theta Boxes !

They are in perfect working condition and will bring you years of enjoyment. Smoke free and perfectly clean environment..

We are Theta's Largest Dealer worldwide and you can check my feedback or just google me to see who we are..    

We are Theatermax and you can check out our website for all our brands. 

Feel free to call me anytime 11AM -10PM eastern time to discuss these items or any of the great items we represent.   


732-616-1010 Text/Call 

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These are 300-350 Watts at 8ohms and will deliver 525 Watts at 4ohms..  

The Enterprise is a 300 Watt monoblock power amplifier, based on the original Citadel and the Dreadnaught II. It benefits from the knowledge, research and dedication that Theta Digital brought to those superlative designs.

The heart of the Enterprise is its fully-balanced differential, zero-feedback circuitry, with meticulously selected solid-state devices throughout. We scrutinize the selection to optimize component parts in each and every stage, and for the performance of the amplifier as a whole.

The sound is similar to the original Citadel amps in veracity and intimacy with the musical experience, and in the prospect of movie performance that will make your home theater your favorite movie palace.

The audio board is a four layer glass-epoxy circuit board: one layer each for positive and negative supply lines, one layer for ground plane, and one layer for the signal path. Its transistors are the same ultra-fast devices that helped give the original Citadel and the Dreadnaught II their superlative sonic signature. The Enterprise uses the same bridge rectifier, mother board, and capacitive banks as the original Citadel did!

Its output power supply uses a single, high-current 480 Watt toroid transformer, which feeds an ultra-fast / soft-recovery 35 Amp full bridge rectifier. The power supply lines are then filtered by two capacitive banks totaling a hefty 80,000 uF. The sonic result of these very clean supply lines to the output transistors is exceeded only by the original Citadel on which it was modeled.

The Enterprise is an exercise in delivering tremendous power with absolute integrity.

1 Single-ended RCA jack.

1 Balanced (XLR) jack.

Input Impedance

50KOhm. Single-Ended or Balanced, for each phase.

Input sensitivity

(Single-Ended) 2.8V RMS input for 300W into 8 ohms.

(Balanced) 1.4V RMS input for 300W into 8 ohms.


(Single-Ended) 25dB (18x).

(Balanced) 31dB (36x).


(Single-Ended) Non-Inverting.

(Balanced) Pin-2 = Positive, Pin-3 = Negative for Non-Inverting Output.

Analog Audio Outputs

1 balanced output (Cardas Type standard)


Standby: Amplifier is muted and output bias is reduced to 10%.

Thermal: Channel has overheated; amp automatically switches to Standby.

Power Output

(8 ohms) 300 W (rated) 350 W (typical)

(4 ohms) 500 W (rated) 525 W (typical)

Frequency Response

(-3dB points @ full power) 0.5 Hz - 400 KHz.



Signal to Noise Ratio

(unweighted) >105dB


Power Requirements

117 VAC, 10A Slo Blo main fuse, 230 VAC, 6A Slo Blo main fuse, 50-60 Hz.

Power Consumption

30W @ Standby; 53W @ idle; 525W @ full power into 8 Ohms; 925W @ 4 ohms.

Trigger Input

5-12 VDC Pulse between 1 and 500mS.


9 1/16" W x 13 7/8" H x 23 5/8" D (230 x 346 x 600 mm)


51 Lbs. Stand alone (19 Kg)

60 Lbs. Boxed with accessories (22.4 Kg)

Maxumium Operating Temperature

Internal: 176° F (80° C)

Room: 131° F (55° C)