The top model of a mono power amplifier is in the production program of the German company Vincent. Schematics of the device are symmetrical (balanced). In each monoblock, the input signal is received on balanced XLR connectors or unbalanced RCA connectors. The total capacity of the capacitors in the monoblock power supply unit is 140,000 Mf. It has 12 powerful Toshiba output transistors. Two pairs of acoustic terminals, the damping factor is more than 600. There is a 12V trigger input.
Monoblocs are placed in steel cases in the form of a "tower". Ribbed side surfaces - to improve heat exchange. And the Vincent SP-998 emits a lot of heat, because it works in pure class A up to an output power of 50 W per channel. In the lower part of the case there is a very large toroidal transformer with a height of about 130 mm and a diameter of about 140 mm. Its power is 1500 VA. Rubycon capacitors are located on the "second floor" of the tower. The output stage is built on 12 complementary pairs of 130 watt Sanken bipolar transistors (2SS3519 and 2SA1386), which provide a maximum constant current of 80 A. Such a serious "stuffing" allows Vincent SP-998 to develop an output power of 1000 W (On a load of 2 Ohms). On the rear panel of the Vincent SP-998 there are balanced (XLR) and unbalanced (RCA) inputs and two pairs of massive terminals for connecting speakers.

Specifications
frequency range: 10 Hz–50 kHz, +/- 0.5 dB
output power (8 Ohms): 300 W, class A: 50 W
output power (4 Ohms): 600 W
sensitivity: 1.1 V
coefficient of nonlinear distortion: 95 dB
output resistance: 47 kΩ
inputs: 1 x RCA, 1 x XLR
outputs: 2 x pairs of acoustic terminals
toroidal transformer, 1000 W
dimensions (WxHxD): 265 x 458 x 420 mm
weight of one monoblock: 31 kg