The Wolfbox is the name for the original passive DI unit, direct box, or DI as invented in the late 1950s by Dr. Edward Wolfrum, PhD, alumnus engineer of Motown, Golden World Records, Terra-Shirma Studios, Metro-Audio Capstan Roller Remote recording, and United Sound Systems in Detroit, Michigan. [1] [2] Used by James Jamerson, Dennis Coffey, Bob Babbit and other The Funk Brothers, the Wolfbox was a key component in the 1960s and 1970s sound of recorded music in the Motown/Detroit scene.
According to Wolfrum, the idea for the creation of the device originally came to him out of necessity, from "…Recording bands back then [early 1960s] and the fact that I simply couldn't afford microphones." [3] It was at Detroit's WEXL in 1962 that 16-year-old staff engineer Wolfrum incorporated his newly created passive direct interface box – later known at the "Wolfbox" – as an interface from the high-impedance output of church PA systems to the microphone input of broadcast audio mixers.
In 2013, a limited-edition run of 25 new Wolfboxes were designed, plotted, supervised & signed by Dr. Wolfrum, [4] in a non-exclusive (unlicensed) agreement with Acme Audio Mfg. Company. Using NOS components and original A-11J and A-12J triad transformers sourced from vintage gear, these new versions found their way to such places as Nashville's Blackbird Studios, London's Abbey Road, and to Blue Note Records President and bassist Don Was. [5] After the 25-unit production, Dr. Wolfrum ended his Acme collaboration [6] and released his schematic of the Wolfbox in 2014 for free public non-commercial use. [7] [8] Now Acme Audio Mfg. Co. produces The Motown DI which uses a new transformer inspired by the original OEM Triad transformers.
The original Wolfboxes relied on vintage A-11J and A-12J Triad transformers (manufactured up to 1974) whose metal structure (i.e. Molybdenum composition) became regulated due to mining and manufacturing toxicity [9] by OSHA [10] and EPA restrictions. [11] [12] [13]
A microphone, colloquially called a mic, or mike, is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting. They are also used in computers and other electronic devices, such as mobile phones, for recording sounds, speech recognition, VoIP, and other purposes, such as ultrasonic sensors or knock sensors.
Motown is an American record label owned by the Universal Music Group. Founded by Berry Gordy Jr. as Tamla Records on January 12, 1959, it was incorporated as Motown Record Corporation on April 14, 1960. Its name, a portmanteau of motor and town, has become a nickname for Detroit, where the label was originally headquartered.
Martha Rose Reeves is an American R&B and pop singer. She is best known for being the lead singer of the Motown girl group Martha and the Vandellas, which scored over a dozen hit singles, including "Come and Get These Memories", "Nowhere to Run", "Heat Wave", "Jimmy Mack", and their signature "Dancing in the Street". From 2005 until 2009, Reeves served as an elected councilwoman in her hometown of Detroit, Michigan, U.S. Martha Reeves and the Vandellas were inducted into the Rock and Roll Hall of Fame in 1995. In 2023, Rolling Stone ranked Reeves at number 151 on its list of the 200 Greatest Singers of All Time.
Brian Holland is an American songwriter and record producer, best known as a member of Holland–Dozier–Holland, the songwriting and production team that was responsible for much of the Motown sound, and numerous hit records by artists such as Martha and the Vandellas, The Supremes, The Four Tops, and The Isley Brothers. Holland, along with Lamont Dozier, served as the team's musical arranger and producer. He has written or co-written 145 hits in US and 78 in the UK.
Edward James Holland Jr. is an American singer, songwriter, and record producer. He is brother to Brian Holland.
A DI unit is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input, usually via an XLR connector and XLR cable. DIs are frequently used to connect an electric guitar or electric bass to a mixing console's microphone input jack. Its signal comes "direct" from the source instrument without passing through the air as sound waves, and thus is isolated from other sounds and avoids effects of microphone or room acoustics. The DI performs level matching, balancing, and either active buffering or passive impedance matching or impedance bridging. DI units are typically metal boxes with input and output jacks and, for more expensive units, “ground lift” and attenuator switches.
The Funk Brothers were a group of Detroit-based session musicians who performed the backing to most Motown recordings from 1959 until the company moved to Los Angeles in 1972.
The Spinners are an American rhythm and blues vocal group that formed in Detroit, Michigan, in 1954. They enjoyed a string of hit singles and albums during the 1960s and 1970s, particularly with producer Thom Bell. The group continues to tour, without any original members, after Henry Fambrough retired in 2023.
A session musician is a musician hired to perform in a recording session or a live performance. The term sideman is also used in the case of live performances, such as accompanying a recording artist on a tour. Session musicians are usually not permanent or official members of a musical ensemble or band.
The Marvelettes were an American girl group formed in Inkster, Michigan in 1960, consisting of schoolmates Gladys Horton, Katherine Anderson, Georgeanna Tillman, Juanita Cowart, and Georgia Dobbins, who was replaced by Wanda Young prior to the group signing their first record deal. Achieving popularity in the early to mid-1960s, they were the first successful act of Motown Records after the Miracles and its first significantly successful female group after the release of the 1961 number-one single, "Please Mr. Postman", one of the first number-one singles recorded by an all-female vocal group and the first by a Motown recording act.
"Hitsville U.S.A." is the nickname given to Motown's first headquarters and recording studio. The house is located at 2648 West Grand Boulevard in Detroit near the New Center area of the city. Motown founder Berry Gordy bought the house in 1959.
Barrett Strong Jr. was an American singer and songwriter known for his recording of "Money ", which was the first hit single for the Motown record label. He is also known for his songwriting work in association with producer Norman Whitfield; together, they penned such songs as "I Heard It Through the Grapevine", "War", "Just My Imagination ", and "Papa Was a Rollin' Stone".
Joseph Lucian Messina was an American guitarist. Dubbed the "white brother with soul", he was one of the most prolific guitarists in Motown Records' in-house studio band, the Funk Brothers.
The Flaming Ember was an American blue-eyed soul band from Detroit, Michigan, United States, who found commercial success starting in the late 1960s.
Joseph Edward Hunter was an American musician and keyboardist, known for his recording session work with Motown Records' in-house studio band, the Funk Brothers. One of the original Funk Brothers, Hunter served as band director from 1959 until 1964, when he left Motown and was replaced by Earl Van Dyke.
Dennis James Coffey is an American guitarist. He was a studio musician for many soul and R&B recordings, and is well known for his 1971 Top 10 hit single "Scorpio".
WCHB is a commercial AM radio station licensed to Royal Oak, Michigan, and serving the Detroit metropolitan area. It broadcasts an urban gospel radio format and is owned by Crawford Broadcasting. The station is a reporter to Billboard's Nielsen/BDS Gospel airplay panel. The radio studios and offices are shared with co-owned WMUZ, WMUZ-FM and WRDT, on Radio Plaza in Ferndale, Michigan.
Woodlawn Cemetery is a cemetery located at 19975 Woodward Avenue, opposite the former Michigan State Fairgrounds, between 7 Mile Road and 8 Mile Road, in Detroit, Michigan.
The Four Tops are an American vocal group formed in Detroit, Michigan in 1953 as the Four Aims. They were one of the most commercially successful American pop music groups of the 1960s and helped propel Motown Records to international fame. The group's repertoire has incorporated elements of soul, R&B, disco, adult contemporary, doo-wop, jazz, and show tunes. Lead singer Levi Stubbs, along with backing vocalists Abdul "Duke" Fakir, Renaldo "Obie" Benson and Lawrence Payton remained together in the group for over four decades, performing until 1997 without a change in personnel. Along with fellow Motown groups the Miracles, the Marvelettes, Martha and the Vandellas, the Temptations, and the Supremes, the Four Tops helped to establish the "Motown sound"; pop-friendly soul and R&B with a clean, polished production quality. They were notable for having Stubbs, a baritone, as their lead singer, whereas most other male and mixed vocal groups of the time were fronted by tenors.
Donald Davis was an American record producer, songwriter and guitarist who combined a career in music with one in banking.