Kenwood C-V351 User Manual - Page 37

Ambience effects How to calculate the proper delay time Assuming that the distance from the front speakers is A meters and that from the surround speakers is B meters: What is delay time? Front speakers Am Bm Surround speakers C-V351/C-V301 (EN) 1 Use the delay time calcula- tion chart on the right. Example: 20 23 17 26 20 16 29 23 17 37 When A = 3 m,B = 3 m, 26 20 16 29 23 17 the delay time is 20 ms. 26 20 16 29 23 17 2 Use the following 8 7 formula for calculation. 6 5 26 20 16 29 26 23 20 17 16 29 23 17 26 20 16 8 7 6 5 Delay time = 20 + 3 × (A - B) (Unit: ms) 4 23 17 4 A (m) 3 2 20 3 2 B (m) 1 1 The sound entering the ears include the direct sound coming from the sound source and the indirect sounds reflected from the walls, floor, ceiling, etc. The indirect sounds are delayed because they travel longer distance required for reflection before they reach the ears. The delay time is the difference in time between the direct sound and indirect sounds. 3 Adjust the level from each speaker. "Test Tone" RC 1 Output the "Test Tone". TEST TONE GRC Test Tone ENTER Test Tone ENTER 2 Adjust the levels of the other speakers than the front speakers (left, right). MULTI CONTROL To increase level (1)While test tone is output from a speaker, (2)Adjust the volume level of the speaker. LEVEL To decrease level Channel Level SL+10dB ENTER To decrease level 3 Quit the speaker level adjustment. TEST TONE Test Tone ENTER To increase level Return ENTER 4 Adjust the delay time. "DELAY" RC GRC 1 Select the Delay Time adjustment display. MODE Delay Time ENTER 2 Adjust the Delay Time. To increase MULTI CONTROL LEVEL Delay Time 20msec To decrease To increase To decrease ENTER 3 Quit the delay time adjustment. Return ENTER ÷ The test tone which sounds like noise move across speakers in the following sequence every 1.5 second. (In Pro Logic mode) TEST Lch (Front speaker, Left) TEST Cch (Center speaker) TEST Rch (Front speaker, Right) TEST SRch (Surround speaker, Right) TEST SLch (Surround speaker, Left) (In 3 STEREO mode) TEST Lch (Front speaker, Left) TEST Cch (Center speaker) TEST Rch (Front speaker, Right) TEsT sR ch Display when test tone is output from a surround speaker ÷ Be sure to adjust from the listening position. ÷ Each press of the key increases or decrease the level by 1 dB. ÷ The levels of the front speaker (Left, Right) cannot be varied in step 3. RC/Main unit Each press switches the adjustment items as shown below. 1 BASS :Tone, Bass 2 TREBLE :Tone, Treble 3 L R :Balance 4 C ch :Center speaker 5 SR ch :Surround speaker, Right 6 SL ch :Surround speaker, Left 7 SW ch :Subwoofer 8 DELAY :Delay time 9 INPUT :Input level ÷ Adjustment items 5, 6 and 8 are not required in the 3 STEREO mode. ÷ Find the optimum delay time for the listening room by referring to "How to calculate the delay time". ÷ The delay time in the PRO LOGIC mode can be adjusted between 15 and 30 ms. ÷ Select the closest value to the value obtained by "How to calculate the delay time". DELAY 2 ) ms Delay time