SPL PASSEQ
A 19-inch rack passive mastering equalizer with three frequency bands, each with separate cut and boost controls and a central output control. It is built on SPL's 120V circuitry and intended for mastering and studio engineers who want a vintage-style passive EQ curve.
- Passive EQ with 3 bands: Low, Mid and High frequency
- Separate cut and boost control per band, plus output control
- HF band extended with 25 kHz and 35 kHz
- Balanced XLR in and out, max level 32.5 dBu
- Frequency range 10 Hz – 200 kHz (-3 dB), dynamic range 134.5 dB
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The PASSEQ is a stereo mastering equalizer built around a single passive filter made of variable resistors, capacitors and coils. Three frequency ranges (Low, Mid and High) each have a cut control on the left and a boost control on the right, with an output control in the middle. Because a passive filter can only attenuate, boosting one region means lowering the others, and a make-up gain stage behind the filter restores the level, by up to 20 dB.
The design takes its cue from passive equalizers of the 1950s and 60s, with curves tuned by ear and compared with a vintage Pultec. The high-frequency band is extended with 25 kHz and 35 kHz positions. The make-up stage uses SPL's 120V technology, which runs the analog audio path at +/-60 V with proprietary SUPRA operational amplifiers, allowing input levels up to 32.5 dBu.
Audio goes in and out over balanced XLR connectors. Power comes from an internal linear supply with a shielded toroidal transformer, switchable between 115 V and 230 V mains. The unit is made in Niederkrüchten, Germany.
Tehnilised andmed
- Bränd
- SPL
- Mudel
- PASSEQ
- Kategooria
- Stuudio › Eelvõimendid ja välisseadmed
Inputs
- Analog inputs
- XLR (balanced)
- Maximum input gain
- 32.5 dBu
- Input impedance
- 20 kΩ
- Common mode rejection
- -60 dBu
Outputs
- Analog output
- XLR (balanced)
- Maximum output gain
- 32.5 dBu
- Output impedance
- 75 Ω
Audio
- Frequency range (-3 dB)
- 10 Hz – 200 kHz
- Crosstalk (1 kHz)
- -108 dBu
- THD + N (+30 dBu, 1 kHz)
- 0.0012 %
- Noise (A-weighted)
- -95.2 dBu
- Dynamic range
- 134.5 dB
- Operating voltage for analog audio
- +/- 60 V
Power
- Power supply
- Internal linear power supply with shielded toroidal transformer
- Operating voltage for relays and LEDs
- + 12 V
- Mains voltage (selectable)
- 230 V AC / 50 Hz; 115 V AC / 60 Hz
- Fuse for 230 V
- T 500 mA
- Fuse for 115 V
- T 1 A
- Power consumption
- max. 15 VA
Physical
- Dimensions (W x H x D)
- 482 x 177 x 300 mm (19 x 6.97 x 11.8 inch)
- Unit weight
- 10.2 kg (22.49 lbs)
- Shipping weight (incl. packaging)
- 11.9 kg (26.24 lbs)