The EQP501 is a passive equalizer based on the classic PULTEC EQP 1A, adapted to the '500' format of API*.
It is made of an all passive section followed by a gain make up stage based on a Discrete Op-Amp (DOA).
The EQP501 retains all the controls from the original but adds some new frequencies to the low and high sections.
Just install it in your API* compatible LunchboxTM rack and start recording.
1 KCS Sets the high cut frequency in kilo-cycles (kHz). Three frequencies are available. The 3 in-between positions are bypass for the whole EQ.
2 ATTEN Sets the attenuation level from 0 to maximum.
3 B.WIDTH Sets the bandwidth of the high boost section. At 0 the bandwith is narrow, peaking high and at 10, the bandwith is wide
4 EQ ON LED indicating the on/off state of the EQ.
5 KCS Sets the high boost frequency in kilo-cycles (kHz). 12 frequencies are available from 2.5 to 18 kHz.
6 BOOST Sets the high frequency boost level from 0 to maximum.
7 ATTEN Sets the low frequency attenuation level from 0 to maximum.
8 CPS Sets the low cut/boost frequency in cycles per second (Hz). 6 frequencies are available from 15 to 100 kHz. There is a small difference between the cut and boost frequencies for each switch position allowing creative use of simultaneous cut and boost.
9 BOOST Sets the low frequency boost level from 0 to maximum.
You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.
The EQP501 kit is a medium difficulty build.
The XT500 option is a cable extension that allows you to test and setup the module outside the lunchbox while connected.
Go to the XT500 page
The 501 case option is a standalone, single slot lunchbox with PSU.The XT500 Extender is not needed with the 501.
Go to the 501 page
If you prefer not to DIY, choose an Assembled product.Assembled products are built on demand and therefore require an additional delay of 2 weeks approximately.It comes fully assembled, ready to use.