SPL Big 500 Series Stereo Expander

The series 500 Stereo Image Enlarger.
Dual-slot channel for stereo image processing in the 500 series.

BiG is distinct.BiG is unique.
BiG offers up new imaginative avenues for sound shaping and produces a noticeably larger stereo image.
With only three controls, intuitive.

Through/On
The On/Bypass switch allows the module to be turned on (On) or off (Bypass).Fast switching between the processed and raw signals is possible.

LED signal lights

The signal LEDs (Sig) show whether the corresponding channel’s input is receiving an audio signal or not.
(At a value greater than -20 dBu)

Shaping Range of Stereo Images                           

Range:

The frequency range that has to be processed can be chosen using the Range control.

Stage:

The frequency range that was previously chosen with the Range control can be adjusted forwards or backwards on the stereo stage using the Stage control.

BIGNESS:

The massive BIGNESS control modifies the stereo image shaping’s intensity.

BASS

After the BIGNESS portion, you can utilise the BASS/Off switch to either activate (BASS) or disable (Off) an extra bass boost.
A passive filter designed in a circuit comparable to the SPL IRON Mastering Compressor’s AirBass function provides the bass boost.

Sounds well

We develop every SPL gadget by ear in addition to following the strategy.
On the circuit boards, every significant component is mounted with through-hole technology.

The heart is at home.

We produce all of our equipment in Niederkrüchten, Germany, which is located on the Lower Rhine.

For the 500 series format, the SPL BIG 500 is a cutting-edge stereo image processing module with extra bass boost control.

The SPL BIG 500 employs a novel technique to creatively and innovatively modify the incoming audio’s stereo. With just three knobs on the Big module, amplifying your music is a cinch. The Bigness knob, which is a huge knob, allows you to adjust how much the input audio is processed.

Range and Stage, two settings in the Stereo Image Shaping module, combine to move certain frequencies either forward or backward.

The Big module also includes a Bass switch that adds a bass boost after the Bigness section. This is achieved through the use of a passive filter based on the AirBass circuit found on the SPL Iron Mastering Compressor

The frequency area to be processed is chosen via the Range control, and the Stage control lets you move the chosen area forward or backward.

Black magic?

In BiG, an analogue filter network processes a difference signal that is extracted from the input signal before it is mixed back into the original signal during a dedicated mixing step. This is a totally unique and distinct method of stereo processing, not M/S processing. When the treated stereo signal is summed to mono, it produces a clean mono signal free of undesired artefacts like phase shifts and cancellations.

Input & Output:

• Maximum input & output gain 21 dBu
• Input impedance 20 kΩ
• Output impedance 150 Ω
• Common mode rejection > 82 dB
• Frequency range (-3 dB) 10 Hz – 100kHz
• THD & N (0 dBu, 10 Hz – 22 kHz) 0.03 %
• Noise (A-weighted) -92.3 dBu
• Dynamic range 113 dB

Dimensions & Weight

Double-spaced module for 500 Series

• Unit weight
  • 1.98 lbs
  • 0.9 kg
• Shipping weight (incl. packaging)
  • 2.31 lbs
  • 1.05 kg

FEATURES:

• With the On/Bypass switch, you can easily switch between processed and unprocessed signals by turning the module on or off.
• Signal LEDs (Sig) show whether an audio signal (with a level higher than -20 dBu) is present at the corresponding channel’s input.
• The frequency range that has to be processed can be chosen using the Range control.
• The frequency range that was previously chosen with the Range control can be adjusted forwards or backwards on the stereo stage using the Stage control.
• The massive BIGNESS control modifies the stereo image shaping’s intensity.
• After the BIGNESS portion, you can utilise the BASS/Off switch to either activate (BASS) or deactivate (Off) an additional bass increase.
• A passive filter designed in a circuit akin to that of the SPL IRON Mastering Compressor’s AirBass function provides the bass boost.