PAIR of Clean RCA BE- 21C Filter Set EQ’s in perfect condition - Secret Weapon passive filter EQ’s!

The BE21C is the veritable King of all Filter EQ’s! One of the recording studio’s most useful tools; filter set EQ’s are touted as the secret weapon for many a top tier producer / engineers. This modified/refurbished pair have been deep cleaned, exhibit zero noise now and have had two sets of brand new pigtails professionally added Feb 2024. The handy front bypass switch works perfect too and is completely silent now that it’s been serviced. You can also still interface the unit via the front panel too, giving you dual input on each module! I let a friend borrow these in his Manhattan studio and he was blown away, see his text to me in last pic. These are truly secret weapon filters for tone shaping with an iconic sonic imprint no plugin can achieve. Super clean too. Near matching serial #’s too! Units have had minor wiring repair, reflowed solder, scrubbed potentiometers (now dead quiet!) and new I/O. Serial numbers: #1 : 1262 #2: 1300 These incredible studio EQ’s were manufactured of the very highest quality in the 1950s by one of the biggest names in the Audio engineering community, RCA. Nothing helps pull the subharmonic frequencies out of your kick drum or your bass guitar better than these, and nothing also pushes a vocal forward, tames your cymbals, overheads, brightens the guitar or Ads punch to a vocal like these equalizers. I like to print just low end from my kick drum or bass gtr and run it in parallel with the original source for massive low end boost! I also use These to carve troublesome spots from overheads and elec gtrs. They also shine to bring vocals up and out front with parallel processing like nothing else. The components were extremely high end and made to meet the rigorous spec requirements of commercial broadcast of the time. PASSIVE PROCESSING: Keep in mind, they are passive, so just like Pultecs, Altecs and others, there’s no power plug. What this means is that they work best coming out of your DAW -> RCA EQ’s -> preamp -> DAW. You can also of course use them live, in a tracking session to get unique sounds and color saturations! If you are not familiar with passive EQ, just know that the only thing they are missing is make up gain so you need to bring them back into your console or a preamp, similarly to a passive Pultec EQ. PASSIVE AUDIO EQUIPMENT 101: The insertion loss is equal to the maximum “boost” level. Everything else, including flat, is attenuated. Use a channelstrip or external line amp set to about 20dB for makeup gain. About any 24dB gain block will work. ALTEC modules, Tele V72, etc. Your loss will always exceed the actual “boost” amount. Combiner and other circuit losses. Almost all basic gain blocks are 22 to 24dB because that’s what most common passive EQs lose. An “ideal” circuit with “perfect“ components can have insertion equal to boost amount. But in this world, components and applied circuits are far from perfect. These are extremely quiet and have no noise, but they are also extremely colorful, and are some of the best filters I’ve ever heard in my life. If you’ve ever heard an engineer say that their secret weapon are filters (David Amlin of Sound on Sound Studios swears by them), you will not find a better pair. What’s also unique about these is that they do not need to be recapped because the hermetically sealed electrolytic capacitors on these are known to last for 200 years apparently, opposed to other vintage capacitors that need to be changed after about 20 years. These things will just go and go and go with little need for repair, as their whisper quiet operation proves. ——————————— BE- 21C Sound Effects Filter EQ Specs: Source Impedance ( unbalanced) 600 Ohms Load Impedance 600 Ohms Input Level — 60 to + 18 dBm Output Level ( maximum) + 18 dBm Frequency Response Variable Insertion Loss 1 dB or less at frequencies remote from cut-off Dimensions, overall 51/4 " high, 19" wide, 5" deep (13.39 cm, 48.26 cm, 12.70 cm) Weight ( unpacked) 15 lbs. ( 6.8 kg.) Finish Light umber gray Ordering Information BE- 21C Variable Sound Effects Filter M I- 11723-A We are one of the only shops that offers FREE Full coverage insurance! If anything is damaged, simply submit your repair receipt to reverb and it will be covered by their worry-free full coverage. Our shop policy has a solid 5 star rating and we pride ourselves on above and beyond customer service but pls know all items are sold as is with a 3 day return window due to rampid returns abuse . Thanks for looking. All the best -