ABCDEFGHIJKLMNOPQRSTUVWXYZAAAB
1
last updated: 12/9/2020
2
Schematic here: https://dbxpro.com/en/product_documents/118_schematicspdf
3
Alternative schematic link: https://web.archive.org/web/20200807100855/https://dbxpro.com/en/product_documents/118_schematicspdf
4
Note: some of the stuff in here I just replaced with parts I had on hand for the hell of it, such as ceramic caps, etc
5
There are some ceramic disk caps on some of the VCA boards I replaced with films, as well. I unfortunately didn't write the values down and they aren't on the 118 schematic, but I replaced them with caps I had on hand
6
Another fun mod would be to remove the RCA I/O panel and replace it with 1/4" jacks
7
8
I ordered all of the parts below off mouser but they could be sourced elsewhere
9
10
Part #Stock PartReplacementTotal QtyPart #Notes
11
CAPS
12
C3100p disk100p C0G/NP01FG28C0G1H101JNT06
13
C1810n disk10n/100v film1PHE426DJ5100JR05
14
C8, C1715p disk15p C0G/NP02FG28C0G1H150JNT06
15
C_ (see note)2u2/16v electro2u22UKW2A2R2MDD
One of the three VCA cards has two 2u2/16v radial electrolytics. I couldn't fit films in these places so I replaced with audio-grade electrolytics
16
C_ (see note)1u/50v electro1u/100v film4MMK15105J100B04L4BULK There are two 1u/50v axial electros with 15mm LS that I replaced with film across the two "260382" VCA cards
17
C_ (see note)1u/50v electro1u/50v film1EEU-FC1H2R2this is on the aforementioned unmarked VCA card with the 2u2 radials. I was able to fit a film cap here
18
C14, C41u/50v electro1u/100v film2MMK15105J100B04L4BULK (same parts as the two 1u/50v axial electrolyrics on the two VCA cards)
19
C6, C15220p disk220p polystyrene223PS122
20
C7*
330n/100v polycarb
330n/100v polyprop.
1MKP2F033301M00JA00I didn't replace mine because it was already a film cap but these are input coupling caps and would recommend an upgrade.
21
C16*
330n/100v polycarb
330n/100v polyprop.
1MKP2F033301M00JA00the lead spacing on this might actually be 7.5mm but the specified 5mm part will work fine if you bend the legs
22
C1233p disk33p C0G/NP01FG28C0G1H330JNT00
23
C1, C2470u / 25v470u / 63v2EGXE630ELL471MLN3Snote: these are axials in the PSU, I replaced them with higher quality radials - they fit fine, you just have to bend the leads a bit
24
C5, C94u7 electro4u7/100v film2ECQ-E1475JFreplaced with big film caps that fit the lead spacing, a big upgrade over the non-polar electrolytic as these are the output caps
25
26
27
Realistically you should also replace the opamps for more hifi, but I opted to leave mine stock to retain the "character" for now, plus I think the stock ones are probably behaving just fine.
28
You could replace the TL082 in OA3 with LME49720NA (you'd want to add a 100n C0G/NP0 MLCC to the supply rails for stability, though). This is probably the most important IC as it is in the signal chain
29
The 4558s could be replaced with NE5532, OPA2134, or LME49720NA as well
30
31
RESISTORS
32
R8, R9, R34, R35470R470R metal film 1%4MFR-25FBF52-470Rreplaced with metal film 1/4 watt because they are in the output path
33
R6, R11, R31, R32, R10, R36100K100K metal film 1%6MFR-25FTF52-100Kreplaced with metal film 1/4 watt because they are in the output path + input path as well
34
R7, R33 110K110K metal film 1%2MFR-25FBF52-110K replaced with metal film 1/4 watt because they are in the output path
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100