Direktebokser - Høytalersimulator

Her har du to bokser med noenlunde tilsvarende funksjoner - en Peavey EDI fra 1980-tallet, og en Hughes & Kettner Red Box MK III av nyere dato (2010-ish).

Det bør nevnes at beskrivelsen 'Pent brukt - I god stand' ikke er dekkende her (det er mulig kun å velge ett alternativ)... Mens Peavey boksen er godt brukt, er Hughes & Kettner boksen nærmest som ny (se bilder).

Slike direktebokser (høytalersinulatorer) kan være hendige og gode alternativer til vanlig oppmikking av forsterkere. Er du lydtekniker, eller spiller du selv live - og du mikker opp gitarforsterkere (høytalere) - kan en slik boks absolutt være mer enn OK der hvor vanlig løsning med mikrofon plassert foran høytaler ikke lar seg ordne, eller resultatet ikke er tilfredsstillende.

OBS: Før du går tar i bruk en slik boks bør du lese deg opp på hvordan du best går frem. Det er spesielt viktig når du kopler mellom forsterker og høytaler på en rørforsterker.

Hughes & Kettner boksen er forøvrig egnet - i tillegg til å være en høytalersimulator - som en standard DI boks (noe som bør være med i "verktøykassa" til alle som befinner seg på en live scene eller driver med innspilling av lyd). Begge boksene fungerer passivt (uten batteri eller ekstern strømforsyning).

Begge enhetene fungerte fint sist jeg testet dem, men jeg tar retur dersom det mot formodning skulle vis seg å være feil med en eller begge. Dekker da også kostnad til returporto. Evt. retur må avtales senest en uke etter at du har mottatt boksene. Returnerer du kun den ene, beregner jeg prisen til 500,- for Red Box og 350,- for den andre.

Jeg selger begge samlet for en lav pris og sender gjerne via Fiks Ferdig. Du kan gjerne hente hos oss i Ask, Gjerdrum hvis det skulle passe. Evt. kan jeg levere i Gjerdrum, Skedsmo, Strømmern, Lillestrøm området. Ta kontakt dersom du har noen spørsmål!

Mer info fra nettet, Red Bok III:

The world's most popular cabinet simulator. Improved professional version, the Red Box Pro. Refined for even greater realism. Balanced transformer and ground lift switch, for both impedance matching and galvanic isolation, and a ground lift switch for knocking out hum. This allows you to connect your guitar amp to your mixing console over lengthy cables without worrying about extraneous noises or ground loops.

No batteries or external power supplies required.

New: Power Amp Simulation. Not just the sound of the speaker cabinet, but the sonic subtleties introduced by the guitar amp's power amp section are now accurately recreated as well.

The Red Box Pro can now double as a standard D.I. box at the flick of a switch. You can bypass the entire Red Box Pro filtering section and connect an acoustic guitar, a bass, or a keyboard.

Controls: 4x12"/Combo switch

Speaker simulation: 4x12" + 2x12" combo

Connections: Line in, Speaker in, Speaker through, mic. level balanced out (XLR).

Approx. Weight: 200 g.

Dimensions: 12 x 4 x 7.2 cm.

Special features: 2 characteristics, Ground Lift switch, Power supply by battery, AC-adaptor or phantom.

Peavey EDI:

The EDI is a different approach to taking instruments direct into a sound reinforcement or studio mixing console. This equalized direct system will solve many problems usually associated with tonality when instruments are fed directly into large sound systems. Most “direct” box-type units are designed to work with the instrument’s signal, before the amplifier or with a line output from the preamp. The main problem with this concept is that the tone coloration, which is generated by the power amp/speaker system, is totally bypassed, and the “direct” hook-up yields an electronically “dry” tonality.

We have designed the EDI with a different concept to help the sound engineer/musician cope with these problems. The EDI works at the power amp output stage just before the speaker, and has been equalized to closely duplicate an average tonal response of the most respected guitar-type loudspeaker currently available today. Duplicating an average tonality of several speakers seems like quite a task from the customer’s viewpoint, but it actually wasn’t very difficult, because most guitar- type speakers exhibit frequency response curves that are very similar.

The EDI takes this similarity into consideration and allows the mix engineer to more closely duplicate the guitarist’s tonality without drastic equalization at the mixer. In fact, during the test period of pre- production with the equalized direct system (EDI), we found that with the EDI the overall sound is closer to what the audience is receiving from an amplifier on stage as opposed to miking the amp in the conventional manner.

Concerts today are often at such extreme sound pressure levels that amplifiers (and all instruments, for that matter,) must be close-miked to eliminate bleed-over problems. Close-miking techniques are unfair to the instruments because the “near field” response yields high distortion and doesn’t give the true “cross-section” of tonality that a person would

receive 30 feet from the amp/speaker. It is also obvious to most sound engineers/musicians that taking instrument amps direct drastically reduces “bleed-over” problems because less “live” mics are in use.

The EDI also includes an adjustment for timbre (harmonic balance), which helps even further to closely duplicate the tonality produced approximately 30 feet in front of the amplifier. This system has a 600 Ohm transformer balanced output which is designed for long, “snake” cable runs and the input and output grounds have been floated. (See path diagram.)

SPECIFICATIONS: Input sensitivity: 35 Volts RMS

Insertion loss: 29 dB

Drain on speaker signal: Less than 1/2 Watts at 30 Volts RMS

Ground situation: Input and output ground isolated

600 Ohm transformed balanced output 1/4" phone jack speaker/amp connection

Dimensions (W x H x D): 7.5 cm x 4 cm x 11 cm

Weight: 0.45 lbs. (0.2 kg)