Recent engineering breakthroughs have resulted in a major upgrade to one of VTL’s most important products - the TL-7.5 Reference Line Preamplifier. Four years after introducing the TL-7.5 to universal acclaim, VTL has revised it for an even higher level of performance. The new design, known as the TL-7.5 Series II, adapts current gain technology developed for the new TP-6.5 Signature Phono Stage. The upgrade results in a lower overall gain (20dB-balanced, 14dB single ended), as well as a dramatically lower noise floor. Luke Manley, President of VTL, credits the improvements to intensive ongoing R&D at the company. “While working on the forthcoming TP-6.5 phono stage, we developed a high current circuit to resolve with very low background noise the small distances that a phono cartridge travels, and we have applied this thinking to the TL-7.5 Series II.” The new circuit delivers even wider frequency response as well as superior musicality and transparency, while maintaining the neutrality that the TL-7.5 Reference Line Stage is famous for. Also included in the upgrade are new parts selected to enhance the resolution with even more speed and presence in the critical top end and midrange. For increased compatibility with modern home theater systems, the Series II adds a fully bi-directional RS-232 control.
The original thinking behind the design of the TL7.5 came from VTL’s goal of creating a preamplifier with the very finest resolving power. To this end, VTL engineers decided on a dual-chassis design. One unit contains the multiple regulated power supplies and audio switching controls, while the other carries only the amplified audio signal, uncontaminated by AC line or control microprocessor noise. This “clean box/dirty box” approach, the balanced mode of operation, and the ultra high resolution volume control all ensure an audio signal of utmost purity, unaffected by external influences. Also fundamental to the design is its hybrid tube/solid state circuitry. A pair of 12AU7 tubes provides harmonic opulence in the gain stage while a MOSFET output stage offers high current capability with ultra-low impedance for optimal matching with any amps and interconnects. The result is a component with striking clarity and detail that presents instrumental timbres and textures in an amazingly lifelike way. You’ll find the most elusive qualities of your recordings--spatial size and organization, instrumental separation, and low-level sound decay--newly revealed, exposing previously obscured detail for a more realistic and satisfying musical experience. The Series II pushes the boundaries of what is possible even further, offering a compelling improvement in bass definition, harmonic accuracy, and the ability to identify tonal differences in instruments. The new TL7.5 Series II is unquestionably another significant step along the path to ultimate musical truth.
Innovative “clean box/dirty box” design to keep musical signals isolated and pure
Hybrid tube/solid state design—the musicality of tubes with the power to drive any load with any length interconnect
Fully differential circuits for all-the-way-through balanced operation for superior noise rejection
12 fully regulated power supplies to preserve tonal and spatial accuracy
A simple, short and direct signal path using the highest quality audio parts delivers greater emotional connection with your music
Programmable switching and triggering functions offer ultimate flexibility for home theater audio management
Feature Summary of the TL-7.5 Series II Reference Line Preamplifier
Tube complement: 2 - 12AU7 tubes
Fully differential circuit with balanced in and out with mirror-image layout
Isolated Control Unit chassis with 12 separate fully regulated power supplies
Separate Audio Unit chassis with zero internal digital activity
Low noise processor control design for all functions
Simple circuit topology with low negative feedback for musical purity
Logical sequenced soft-start power up for extended tube life
Ultra low impedance output stage to drive any length of cable and any power amplifier
Shock-mounted gain stage
Modular volume control and output stages
All Infini and Multicaps in signal path
95-step 70dB discrete relay attenuator for all attenuation functions
Processor loop – any of 8 inputs can be assigned as fixed unity gain pass through
Tape monitor function for both tape loops
4 separately programmable trigger outputs
Programmable input offsets
Selectable padded inputs
Rear IR receiver for all functions
Rigid Combination steel and non-magnetic chassis and machined aluminum remote wand
TL-7.5 Series II Reference Line Preamplifier Data Specifications
| 진공관 구성 |
2 x 12AU7 |
| 입력부 |
4 pairs balanced/XLR or RCA single-ended
4 pairs single-ended/RCA |
| 출력부 |
2 pairs balanced out
2 pairs single-ended RCA out
2 pairs single-ended RCA buffered Tape Out |
| 리모트 콘트롤 기능 |
Power
Source Selec
Volume up/down
Mute
Fade
Balance Control
Phase Reverse |
| 게인 |
20 dB |
| 출력 임피던스 |
25 Ohms (Max 150 ohms at 10Hz) |
| 입력 임피던스 |
50K Ohms (20k ohms min) |
| 주파스 응답 + 0 - 1 dB: |
1 Hz - 100KHz (20Hz – 100kHz +0–1dB into 600 ohms
with 900pf 20’ interconnect cable) |
| 최대 출력 전압 < 1% THD: |
45 Volts 10Hz – 200kHz into 600 ohms at 1%THD |
| 채널 분리도 |
> 100 dB @ 1KHz (>80 dB @ 20kHz) |
| 소비 전력 |
150 Watts |
| 규격 (W x D H): |
Control chassis
17.5 x 17.5 x 4 inches
44.5 x 44.5 x 10.2 cm
Audio chassis
17.5 x 17.5 x 6 inches
44.5 x 44.5 x 15.3 cm |
| 무게 |
75 lbs (34 Kg) Fully packed |
| 채널간 대화 채널 |
>100dB (>80dB at 20kHz) |
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