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preliminary

O p e r a t o r s M a n u a l

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Содержание LL2A

Страница 1: ...preliminary O p e r a t o r s M a n u a l ...

Страница 2: ...manual printing pdf formatting 04 2020 using this manual or any part of it without permission is a violation of copyright laws LL2a is a registered trademark of little labs ...

Страница 3: ... If you open the LL2A use the tools provided one for the knob remov al 1 5mm Allen hex L key and one for the panel 3 32 Allen hex L key If rack mounting using the LL2A rack kit please remember to disconnect the power beforehand There are internal high voltages on the PCB traces and wires next to the Nixie tube Please contact Little Labs for any service issues The I O of the LL2A is unique It is ba...

Страница 4: ...ing the same old tech out there to make a compressor Then a new way of controlling audio levels was brought to my attention by one of my brilliant audio designer friends Frankly I had a hard time understanding how it worked It uses in the audio path a single linear analog multiplier to con trol the attenuation not the amplification of an audio signal The tricky part is how the analog multiplier re...

Страница 5: ...s The meter So many compressors are using cheap Chinese made VU meters or boring LEDs I hate both I do love a nice big professional VU meter but didn t have the room for it So I love NIXIE tubes and they are still available at least for now as new old stock out of Ukraine They are reliable and have infinite range Tricky to get the VU ballistic just right but I think you ll be happy and doesn t it ...

Страница 6: ...r will be the domi nant master As a standalone compressor meaning nothing plugged into the link jack pushing the link button in slows down the compressor Too fast of an attack release in any compressor on bass will make the bass sound distorted this will alleviate that Meter button Selects whether you want the NIXIEmeter to indicate gain reduc tion or VUballistic characteristic output level Sidech...

Страница 7: ...re wired in parallel with the XLR jacks for your convenience As an example to make it easy to tap off to feed a high pass filter then to feed the sidechain insert Stereo unbalanced operation For unbalanced stereo use you will need a special cable wired TRS tip left ring right sleeve earth or XLR pin 2 left pin 3 right pin 1 earth There are pre wired cables called insert cables that will work they ...

Страница 8: ...that s part of the reason they sound so good This circuit topology allows you to use the LL2A stereo unbal anced or mono balanced as you know but in this configuration keep in mind some rules for hooking up apply You don t want to feed a mono balanced signal to the input and then feed a mono unbalanced input fromthe LL2A output for example Doing this would be driving the audio signal into ground a...

Страница 9: ...her active device in the audio signal path is the linear analog multiplier on the input This allows the LL2A to have a 0 5 ohmoutput im pedance Why is that good Well if you happen to be feeding after the LL2A vintage transformer gear transformers love a super low output impedance As an analogy it s like the difference between driving a V6 car and a V8 supercharged Sonically it is pure effortless a...

Страница 10: ...LL2A Compression ratio The LL2A does not have a fixed ratio it is a soft knee compressor limiter Here is a graph of the input level vs output level knee ...

Страница 11: ...ast and similar to the attack setting on the very popular Fairchild 670 number two setting but with a slower release To obtain a much slower attack and release select the link button without a link plug in the jack this creates a 2400 microsecond attack 4 9 second release Below is a graph of the standard 400 ms attack and 0 9 second release ...

Страница 12: ...reo unbalanced input impedance 10k Ω Output impedance Mono balanced output impedance 0 5Ω Stereo unbalanced output impedance 0 5 Ω Maximumoutput level In balanced mono 28dB In unbalanced stereo 22dB Dimensions 7 25 wide 1 5 height 7 5 depth with knobs other ...

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Страница 14: ...t you might want to return the LL2A to a stand alone unit at a later date 6 The rack kit RAKA extrusion replaces the plastic frame piece 7 Line the holes up with the chassis placed behind the rack kit RAKA extrusion and with the front panel placed on the front of the rack kit RAKA extrusion Carefully screw back in the 4 40 socket head screws using preferably the longer socket head 4 40 socket head...

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Страница 16: ...little labs 6711 whitley ter los angeles ca 90068 e mail littlelabs littlelabs com web littlelabs com sales service technical support 323 851 6860 manual printing pdf formatting 04 2020 ...

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