Tube Tech HLT 2A Stereo Shelving EQ and Tilt Filter
The Tube-Tech HLT 2A is a stereo high and low shelving EQ with a midrange T filter control designed to tilt the whole frequency spectrum around a selected midrange frequency.
The Tube-Tech HLT 2A is an innovative and powerful shaping EQ that remains easy to use. The combination of the two shelving bands and midrange T control offers an impressive array of EQ shaping options which are very useful to tracking, mixing and mastering engineers alike.
The shelving filters are built around a high gain valve amplifier while the T-filter uses a passive filter placed after the output amplifier. Each section has its own dedicated Bypass switch as well as an overall bypass switch.
The midrange T-Filter “tilts” the entire spectrum around a selectable midrange frequency point. Frequencies above that point increase (or decrease) while frequencies below that point decrease (or increase). This unique topology, provides a powerful and uniquely efficient way to get beautiful-sounding overall equalization. As such, the Tube-Tech HLT-2A is destined to become a “go-to” equalizer in high-end mastering houses,smaller project studios, and everything in between.
Features:
- Tube based push-pull amplifier
- Freq. resp. @ -3 dB: 5 Hz – 55 kHz
- Low noise: < -80 dBU @ 0 dB gain
- CMRR: > 60 dB @ 10 kHz
- All-tube active/passive EQ
- FILTERS:
- Low cut: 18, 25, 40, 60, 85 Hz, 6db/octave
- Low shelving: 18, 37, 80, 180, 370, 800 Hz. Gain: +/‑12dB
- High shelving: 1, 2, 5, 10, 15, 22 kHz Gain: +/‑12dB
- T.-filter: 0,5, 1, 2kHz. Gain: +4/-7 dB
- High cut: 12, 15, 18, 20, 25 kHz, 6db/octave
- Tracking between channels: +/-0,3 dB
- Input impedance: >10 kΩ
- Output impedance: < 60Ω
- Conductive plastic potentiometers
- In- and output are transformer balanced and fully floating
The Sound of the HLT 2A
The TUBE-TECH HLT 2A marks a different approach to EQ’ing. It is a very powerful overall shaping EQ, yet extremely simple to operate. Simply¬†put, the HLT2A will yield good results for basically any material and application, ranging from the demanding mastering engineer to the sound quality hungry project studio owner. The combination of Hi and Lo shelf and Lo/Mid frequency T just creates a ton of very nice EQ shaping possibilities!
Specifications
Input impedance: >10 kΩ
Output impedance: < 60Ω
Frequency response (-3dB):5 Hz – 55 kHz
Distortion (THD+n @ 40 Hz):
0 dBU: < 0,10 %
10 dBU: < 0,10 %
Max output (1% THD+n): > +26 dBU
Max input (1% THD+n): > +25 dBU
Noise(Rg=200Ω):
22Hz-22kHz:<-85 dBU
CCIR-468-4:
CMRR (@ 10kHz): <- 60dB
Gain: 0dB
X-talk (@ 10kHz): >40 dB
FILTERS:
Low cut: 18, 25, 40, 60, 85 Hz, 6db/octave
Low shelving: 18, 37, 80, 180, 370, 800 Hz
Gain: +/-12dB
High shelving: 1, 2, 5, 10, 15, 22 kHz
Gain: +/-12dB
T.-filter: 0,5, 1, 2kHz
Gain:+4/-7 dB
High cut: 12, 15, 18, 20, 25 kHz, 6db/octave
Tracking between channels: +/- 0,3 dB
Tubes:2x ECC82, 4x ECC83
Dimensions:H: 2 units, W: 19″, D: 165 mm
Weight:
4,3kg (Net)
5,5kg (Shipping)
Power requirements: 115V/230V, 50-60Hz, 30-45W