diff --git a/apps/api/app/api/routes/voice_clones.py b/apps/api/app/api/routes/voice_clones.py
old mode 100755
new mode 100644
index 740796283..ccbf28383
--- a/apps/api/app/api/routes/voice_clones.py
+++ b/apps/api/app/api/routes/voice_clones.py
@@ -6,7 +6,7 @@ import logging
 from typing import Optional
 
 from app.auth import AuthenticatedUser, get_current_user
-from app.dependencies import get_audio_url_signer, get_cosyvoice_service, get_voice_clone_profile_repository
+from app.dependencies import get_cosyvoice_service, get_voice_clone_profile_repository
 from app.schemas.voice_clone import (
     CreateVoiceCloneRequest,
     ListVoiceCloneResponse,
@@ -37,16 +37,14 @@ logger = logging.getLogger(__name__)
 router = APIRouter()
 
 
-def _to_response(profile, sign_url=None) -> VoiceCloneProfileResponse:
-    source_url = profile.source_audio_url
-    if sign_url and source_url:
-        source_url = sign_url(source_url)
+def _to_response(profile) -> VoiceCloneProfileResponse:
+    # source_audio_url 是用户传入的原始 URL（可能是外部地址），不做预签名转换
     return VoiceCloneProfileResponse(
         id=profile.id,
         user_id=profile.user_id,
         name=profile.name,
         description=profile.description,
-        source_audio_url=source_url,
+        source_audio_url=profile.source_audio_url,
         voice_id=profile.voice_id,
         voice_model=profile.voice_model,
         language=profile.language,
@@ -77,7 +75,6 @@ def create_voice_clone(
     request: CreateVoiceCloneRequest,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     workflow: VoiceCloneWorkflowService = Depends(_get_workflow_service),
-    sign_url=Depends(get_audio_url_signer),
 ) -> VoiceCloneProfileResponse:
     """创建音色克隆任务。
 
@@ -113,7 +110,7 @@ def create_voice_clone(
             except Exception as inner_e:
                 logger.error(f"Failed to mark profile as failed after dispatch error: {inner_e}")
 
-    return _to_response(profile, sign_url)
+    return _to_response(profile)
 
 
 @router.get("", response_model=ListVoiceCloneResponse)
@@ -123,14 +120,13 @@ def list_voice_clones(
     limit: int = Query(50, ge=1, le=200),
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     repository: SQLAlchemyVoiceCloneProfileRepository = Depends(get_voice_clone_profile_repository),
-    sign_url=Depends(get_audio_url_signer),
 ) -> ListVoiceCloneResponse:
     """获取用户的音色克隆列表。"""
     user_id = authenticated_user.user.id
     use_case = ListVoiceClonesUseCase(repository)
     items, total = use_case.execute(user_id, status=status_filter, skip=skip, limit=limit)
     return ListVoiceCloneResponse(
-        items=[_to_response(p, sign_url) for p in items],
+        items=[_to_response(p) for p in items],
         total=total,
     )
 
@@ -140,7 +136,6 @@ def get_voice_clone(
     clone_id: str,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     repository: SQLAlchemyVoiceCloneProfileRepository = Depends(get_voice_clone_profile_repository),
-    sign_url=Depends(get_audio_url_signer),
 ) -> VoiceCloneProfileResponse:
     """获取音色克隆详情。"""
     user_id = authenticated_user.user.id
@@ -149,7 +144,7 @@ def get_voice_clone(
         profile = use_case.execute(clone_id, user_id)
     except VoiceCloneNotFoundError:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found")
-    return _to_response(profile, sign_url)
+    return _to_response(profile)
 
 
 @router.get("/{clone_id}/status", response_model=VoiceCloneStatusResponse)
@@ -198,7 +193,6 @@ def retry_voice_clone(
     clone_id: str,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     workflow: VoiceCloneWorkflowService = Depends(_get_workflow_service),
-    sign_url=Depends(get_audio_url_signer),
 ) -> VoiceCloneProfileResponse:
     """重试失败的音色克隆。
 
@@ -231,4 +225,4 @@ def retry_voice_clone(
             except Exception as inner_e:
                 logger.error(f"Failed to mark profile as failed after dispatch error: {inner_e}")
 
-    return _to_response(profile, sign_url)
+    return _to_response(profile)